Lot of people have been asking me how to save swf animations and YouTube videos. Although i have already covered these in my earlier posts, but this time we see a new way to view temporary internet files for firefox.

People know that in Internet Explorer they just open a folder of temporary internet files, view all saved content and copy any file they wanted. Some people still come and ask me which folder to open for firefox ??

Actually for Firefox there is no folder. Firefox stores all its cache data in a single file. Now to read this file you can go to you address bar and type

about:cache

You get all the cache entries stored on your disk or memory, whichever you choose.

Now its pretty difficult to locate what you are searching for and this is where Cache Viewer comes into play.

This extenion is GUI Front-end of “about:cache”.
Allows searching and sorting memory and disk cache files.

In my last post I was talking about the contest which was organised. There was a particular question. This is the question –

E-Commerce R-Us recently discovered that their e-commerce site did not include a credit card number verification operation on the data that the user submitted for buying their software. The company decided to hire you and your team to develop a credit card validation program. You will be provided with a credit card number with the length varying from 13 digits to 16 digits. The algorithm is a simple mod 10 operation. Each number of the credit card is weighted by either 2 or 1. The credit card number must be zero-filled on the left to create a sixteen digit number, and then the pattern starts with 2, alternating with a 1. If the number multiplied by the weight results in a 2-digit number, each digit is added to the sum. The final sum with the check digit should be a multiple of 10.

Input Format: The user will provide you with a credit card number without spaces.

Output Format: The program will return “Valid” or “Invalid” depending on the success or failure of the check digit.

Last month I got a chance to organise an event all by myself. We had to do all the work from preaparing notices to checking answers. I took around 4 hrs to select ssome questions because questions had to be easy and tricky. The worst part was checking answers, because we had to go through some of the dumbest solutions ever :) I will cover that up in my next post my one extremely ‘intelligent’ solution.